Java tutorial
/** * PhoneGap is available under *either* the terms of the modified BSD license *or* the * MIT License (2008). See http://opensource.org/licenses/alphabetical for full text. * * Copyright (c) Matt Kane 2010 * Copyright (c) 2011, IBM Corporation */ package org.apache.cordova.plugins.barcodescanner; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.app.Activity; import android.content.Intent; import android.util.Log; import org.apache.cordova.api.Plugin; import org.apache.cordova.api.PluginResult; /** * This calls out to the ZXing barcode reader and returns the result. */ public class BarcodeScanner extends Plugin { private static final String TEXT_TYPE = "TEXT_TYPE"; private static final String EMAIL_TYPE = "EMAIL_TYPE"; private static final String PHONE_TYPE = "PHONE_TYPE"; private static final String SMS_TYPE = "SMS_TYPE"; public static final int REQUEST_CODE = 0x0ba7c0de; public String callback; /** * Constructor. */ public BarcodeScanner() { } /** * Executes the request and returns PluginResult. * * @param action The action to execute. * @param args JSONArray of arguments for the plugin. * @param callbackId The callback id used when calling back into JavaScript. * @return A PluginResult object with a status and message. */ public PluginResult execute(String action, JSONArray args, String callbackId) { this.callback = callbackId; if (action.equals("encode")) { JSONObject obj = args.optJSONObject(0); if (obj != null) { String type = obj.optString("type"); String data = obj.optString("data"); // If the type is null then force the type to text if (type == null) { type = TEXT_TYPE; } if (data == null) { return new PluginResult(PluginResult.Status.ERROR, "User did not specify data to encode"); } encode(type, data); } else { return new PluginResult(PluginResult.Status.ERROR, "User did not specify data to encode"); } } else if (action.equals("scan")) { scan(); } else { return new PluginResult(PluginResult.Status.INVALID_ACTION); } PluginResult r = new PluginResult(PluginResult.Status.NO_RESULT); r.setKeepCallback(true); return r; } /** * Starts an intent to scan and decode a barcode. */ public void scan() { Intent intentScan = new Intent("org.apache.cordova.plugins.barcodescanner.SCAN"); intentScan.addCategory(Intent.CATEGORY_DEFAULT); this.ctx.startActivityForResult((Plugin) this, intentScan, REQUEST_CODE); } /** * Called when the barcode scanner intent completes * * @param requestCode The request code originally supplied to startActivityForResult(), * allowing you to identify who this result came from. * @param resultCode The integer result code returned by the child activity through its setResult(). * @param intent An Intent, which can return result data to the caller (various data can be attached to Intent "extras"). */ public void onActivityResult(int requestCode, int resultCode, Intent intent) { if (requestCode == REQUEST_CODE) { if (resultCode == Activity.RESULT_OK) { JSONObject obj = new JSONObject(); try { obj.put("text", intent.getStringExtra("SCAN_RESULT")); obj.put("format", intent.getStringExtra("SCAN_RESULT_FORMAT")); obj.put("cancelled", false); } catch (JSONException e) { //Log.d(LOG_TAG, "This should never happen"); } this.success(new PluginResult(PluginResult.Status.OK, obj), this.callback); } if (resultCode == Activity.RESULT_CANCELED) { JSONObject obj = new JSONObject(); try { obj.put("text", ""); obj.put("format", ""); obj.put("cancelled", true); } catch (JSONException e) { //Log.d(LOG_TAG, "This should never happen"); } this.success(new PluginResult(PluginResult.Status.OK, obj), this.callback); } else { this.error(new PluginResult(PluginResult.Status.ERROR), this.callback); } } } /** * Initiates a barcode encode. * @param data The data to encode in the bar code * @param data2 */ public void encode(String type, String data) { Intent intentEncode = new Intent("org.apache.cordova.plugins.barcodescanner.ENCODE"); intentEncode.putExtra("ENCODE_TYPE", type); intentEncode.putExtra("ENCODE_DATA", data); this.ctx.startActivity(intentEncode); } }